Question

(7p-2)³ using identity​

Answer 1

Answer:

Step-by-step explanation:

(7p - 2 )³

= ( 7p )³ - 3 (7p)²(2) + 3 (7p )(2)² - (2)³ ( ∵ (a - b)³ = a³ - 3a²b + 3ab² - b ³ )

= 343p³ - 3 (49p²) (2) + 3 (7p )(4) - 8

= 343p³ - 294p² + 84p - 8 is the answer.